The whole thing cries out for a third season. The story is really good, but there are hangs. The first season definitely had more content. For me, the ending is missing, no matter if it's Open End, I miss it.
There are too many stories and too many untold stories. The topic itself is probably also very difficult to implement without causing offence.
For me personally, definitely a series to watch, even without a K-drama background.
I really hope for a sequel, because I also find the topic very important.